A delivery person carries a stack of three boxes labeled 1, 2, and 3. Box 3 is on the bottom of the stack, and box 1 is

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A Delivery Person Carries A Stack Of Three Boxes Labeled 1 2 And 3 Box 3 Is On The Bottom Of The Stack And Box 1 Is 1 (46.25 KiB) Viewed 86 times

A delivery person carries a stack of three boxes labeled 1, 2, and 3. Box 3 is on the bottom of the stack, and box 1 is on the top. The masses of boxes 1, 2, and 3 are mı = 3.5 kg, m2 = 4.5 kg, and m3 = 8.0 kg, respectively. The delivery person places the stack of boxes on an elevator floor, which then accelerates upward with a magnitude of a = 0.90 m/s2 Assume that the positive direction is up. Calculate the contact force F1–2 that box 1 exerts on box 2 during the acceleration. F1-2 = = N Calculate the contact force F3+2 that box 3 exerts on box 2 during the acceleration. F32 = N